private String GetAppVersion() {
    try {
        PackageInfo _info = mContext.getPackageManager().getPackageInfo(mContext.getPackageName(), 0);
        return _info.versionName;
    }
    catch (PackageManager.NameNotFoundException e) {
        e.printStackTrace();
        return "";
    }
}

private int GetVersionCode() {
    try {
        PackageInfo _info = mContext.getPackageManager().getPackageInfo(mContext.getPackageName(), 0);
        return _info.versionCode;
    }
    catch (PackageManager.NameNotFoundException e) {
        e.printStackTrace();
        return -1;
    }
}

始终使用try-catch块：

String versionName = "Version not found";

try {
    versionName = context.getPackageManager().getPackageInfo(context.getPackageName(), 0).versionName;
    Log.i(TAG, "Version Name: " + versionName);
} catch (NameNotFoundException e) {
    // TODO Auto-generated catch block
    Log.e(TAG, "Exception Version Name: " + e.getLocalizedMessage());
}

如果您只需要版本名称，请稍微缩短版本。

try{
    String versionName = context.getPackageManager()
    .getPackageInfo(context.getPackageName(), 0).versionName;
} catch (PackageManager.NameNotFoundException e) {
        e.printStackTrace();
        return false;
}

    Log.e("TAG","VERSION.RELEASE {" + Build.VERSION.RELEASE + "}");
    Log.e("TAG","\nVERSION.INCREMENTAL {" + Build.VERSION.INCREMENTAL + "}");
    Log.e("TAG","\nVERSION.SDK {" + Build.VERSION.SDK + "}");
    Log.e("TAG","\nBOARD {" + Build.BOARD + "}");
    Log.e("TAG","\nBRAND {" + Build.BRAND + "}");
    Log.e("TAG","\nDEVICE {" + Build.DEVICE + "}");
    Log.e("TAG","\nFINGERPRINT {" + Build.FINGERPRINT + "}");
    Log.e("TAG","\nHOST {" + Build.HOST + "}");
    Log.e("TAG","\nID {" + Build.ID + "}");

幸亏https://stackoverflow.com/a/40421709/2828651

对于Xamarin用户，使用此代码获取版本名称和代码

版本名称：公共字符串getVersionName（）{return Application.Context.ApplicationContext.BackageManager.GetPackageInfo（Application.Context.ApplicationContext.PackageName，0）.VersionName；}版本代码：公共字符串getVersionCode（）{return Application.Context.ApplicationContext.BackageManager.GetPackageInfo（Application.Context.ApplicationContext.PackageName，0）.VersionCode；}

试试这个：

try
{
    device_version =  getPackageManager().getPackageInfo("com.google.android.gms", 0).versionName;
}
catch (PackageManager.NameNotFoundException e)
{
    e.printStackTrace();
}